Supporting structure for rollers



p 1930- w. HAHNENKAMM E SUPPORTING STRUCTURE FOR AL. ILOLLERS Filed June 27, 1928 H llllll ..V l

Patented Sept;-

UNITED WILHELM HAH mvK Mivr Aim wA n MaB BERGER, or FBANK oBr oN-THE MAIm I access, GERMANY, ASSIGNORS To I. eraannmnnmrarn AKmNeEsEL sonAr'r, 1

or rRANnroRT-oN-THE-M I Grammar, A oonrormrio v or GERMANY surroarnve surnnc'ruan ronfno rnns' f 7 Application filed June 27, 192s, Serial No. 288,647, and in eeilaan zrune 36,1927;

i Y The present invention relates toimprove ments in drying apparatus.

' For drying lnoustrallyfona large scale substances. in the form of a paste,'1t"1s ad vantageous to use' the socalledll-luil lard-p apparatus.

Such'an apparatus comprises a brick heat-M ing-chamber through which hot air is blown by means of a fan. In this chamber aband 10 of wire netting ofconsiderable length travels over rollers Thewire net is similar to fencing nets, except that its meshes'havena width of about 10 mm. WVhen such anar row-meshed net is, drawn through the paste,-

1 the meshes become I filled with the paste which can then be driedinthis state by the current othot air. All thathasfthento be done to removetheldriedpaste'i'sftojbend the net more or lessl sharpjly over rollers of small diameter so that'tlie dried'material drops in pieces from the net; The appara- KtLtS glYQS' verysatisfactoryfresults; its efli- 1 clency 1s hlgh, and the sconsumption oiheat- V is favourable becausethe air; currentpasses 5 through the apparatus in a long path on tlie counter-current principlef The only drawback to the apparatus inquestion is thi /BX cessive wear and tear of the expensive netting, However carefully the rollers are mounted and notwithstanding the use of var ous auxlliary devices, such as guard rails, grooves on,

the rollers or pressure-rollers, for the purpose of keeping the band in constantposition,dis placement of the band laterally is bound to 1 occur and if this happens suddenly the net, is exposed to great tension'and stretched so 7 that it isstill further displaced laterally,'until itbecomes bent at the edge and therefore useless.

By our present invention in drying apparatus of this kind the rollers carrying the band of wire netting or other material are i mounted insu'ch a manner that they are kept in balanceby a system of springs operating ,actionofthe springs'in planes at right angles to each other. Normall'y,the roller loaded in the direction of the traction of the band: 7

and inaxialdire'ction of the roller. Thus the bearings may be mounted to slide, under I .A Huillard panyingsdr'awings, Figrl being a diagram- 1 matic vertical sect-ion and Fig a sectional, view along'line 21-2.

a is the brick heating-chamber through I which the tan b, frontof'a'heating champher 0, blows hot air d arebaffles whose funC- e "5 5 v tion is to cause-the airtoltakea serpentine course through theapparatusi' e and ei are theupper an'dlower guidejrollers of'which,

for instance,th e upper rollers e are mounted I v in slidingbearings, and "are: keptc inbalance by springs ff and f in the direction of the tractionof the'band, and-by lateral springs I 9 (see Fig." 2) in the. axial direction of the rollers, so thatthey can move in eitheril direction when the loader the band varies.

his the band of wire netting. I" 7} is a trough rel m;

air.

We claim:

In a drying apparatus comprisingan end- L lessjband of wirenetting travelling overa number of guide roller-s, devices to 'mamtain the balanceofthe guide rollers and-of the direction oflthe traction ofthebandyand "In testimony whereof, e alibi our signa tures. r I

., 'DR. WI IifIELM HAHNENKAMM.

band consistingo'f springs operative inthe 75 which contains the paste to be dried and through whichthe net runs. is "is, a scraper s I v "which removes the excess of the paste. Rollers Z serve to bend the net for removing the dried substance, which is collected in the barat the outlet for the moisture laden I 

